Airlock Airlock 720/40 Eyeglasses 038 Satin Black 53 21 150

the best for use in all activities, light and safe. However, you need to have a backup, because it breaks down in a time around two years.

I've had Marchon Airlock for last several years. They are stronger then it looks. Finally nose piece came apart after 7 years. They are the best so far. My sunglass is still in very good shape.